Beginning Perl for Bioinformatics

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N
 n (next) command
 N (unknown)
names
 filenames, operating system
 PDB file records
 Perl pathnames
 scalar variables
 subroutine
 variables
 National Center for Biotechnology Information (NCBI) , 2nd  , 3rd  , 4th
 nested expressions
 order of evaluation
 nested loops
 networks of interacting biological systems, modelling
 newlines
 matching with metasymbols
 motifs split by
 removing from filenames
 in scalars, regular expressions and
 strings containing, matches against
 newsgroups, Perl
 next (n) command
 next operator
 NMR (nuclear magnetic resonance) studies, macromolecule structure
 noncoding DNA
 nongreedy or minimal matching
 not operator , 2nd
 logical negation
 NP-complete problems
 nucleic acids
 letters representing
 nucleotide-nucleotide version (BLASTN)
 nucleotides , 2nd
 choosing random, subroutine for
 codons
counting
 tr function, using
 primary structure of
 numbering positions in Perl strings and arrays
numbers
 array of, sorting
 floating-point , 2nd
 incrementing
 random and pseudo-random
 as scalar values
storing in scalar variables
 and printing
 numeric equality (==), testing for

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